Here is first Nagarjuna's verse and then Aryadeva. Comments & clarifications of this cosmogonical outline, please:

Pañcakrama, chapter 3, verse 15:

asvatantraṃ jagat sarvaṃ svatantraṃ naiva jāyate |

hetuḥ prabhāsvaraṃ tasya sarva-śūnyaṃ prabhāsvaram ||

“The entire world is dependent [on a cause], for something independent can never arise. Its [the world’s] cause is luminosity (prabhāsvara); luminosity is the universal void (sarva-śūnya).”

Āryadeva’s four verses on cosmogony from the Svādhiṣṭhāna-prabheda that explain this more fully are:

prabhāsvarān mahā-śūnyaṃ tasmāc copāya-sambhavaḥ |

tasmād utpadyate prajñā tasyāḥ pavana-sambhavaḥ || 18 ||

18. From luminosity (prabhāsvara) [arises] the great void (mahā-śūnya), and from that is the arising of means (upāya). From that, wisdom (prajñā) is arisen. From that is the arising of air.

pavanād agni-sambhūtir agneś ca jala-sambhavaḥ |

jalāc ca jāyate pṛthvī sattvānām eṣa sambhavaḥ || 19 ||

19. From air is the arising of fire, and from fire is the arising of water; and from water, earth is born. This is the arising of living beings.

bhū-dhātur līyate toye toyaṃ tejasi līyate |

tejaś ca sūkṣma-dhātau ca vāyuś citte vilīyate || 20 ||

20. The earth element dissolves in water. Water dissolves in fire, and fire in the subtle element [air]. Air dissolves in mind (citta).

cittaṃ caitasike līyetāvidyāyāṃ tu caitasam |

sāpi prabhāsvaraṃ gacchen nirodho ’yaṃ bhava-traye || 21 ||

21. Mind will dissolve in the mental derivatives (caitasika), and the mental derivatives in ignorance (avidyā). This, too, will go to luminosity (prabhāsvara). That is the cessation of the triple world.

Basically, there is not even one buddha, only great wisdom. Bodhisattva Hsuan Hua